Fastening device for interchangeable projection lens

Details Fastening device for interchangeable projection lens Fastening device for interchangeable projection lens

1983-05-18

1985-07-02

Corbin, John K.

Pipe joints or couplings

With casing, lining or protector

Insulated

285DIG22, 354286, G03B 1700

Patent

active

045264406

ABSTRACT:
The invention relates to a device for detachably attaching a lens tube (2) to a lens barrel (1). It is characterized in that the lens barrel inside its forward free edge (5) is provided with peripheral grooves (3) extending in the same plane, the respective bottom of which at the ends (9) of the groove inclined in said plane transforms into the shell surface of the barrel (1), which shell surface tapers conically (6) to the free edge (5) of the barrel. A guide shoulder (4) tapering in wedge-shape thereto is located on the shell surface between two adjacent grooves (3). The tube (2) is provided with radially resilient hooks (11) capable at mounted tube (2) to engage with the grooves (3) of the barrel (1).

REFERENCES:
patent: 2618201 (1952-11-01), Brohl et al.
patent: 3588149 (1971-06-01), Demler et al.

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